Concrete-mixer.



G. GARLSON. CONCRETE MIXER.

APPLICATION FILED APR. 6, 1968.

"' MIMI Patented Aug. 30, 1910.

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\J- /f I 1 G. CARLSON.

CONCRETE MIXER.

APPLICATION FILED APR. 6, 1908.

Patented Aug. 30, 1910.

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IVVE/VTOR ATTORNEY UNITED STATES PATENT onnicu,

GUSTAVE CARLSON, F PLAINFIELD, NEW JERSEY, ASSIGNOR TO RANSOME CONCRETE MACHINERY COM' ANY, 0F DUNELLEN, Nil-V JERSEY, A CORPORATION OF NEW YORK.

CONCRETE-MIXER.

Application filed April 6, 1908. Serial No. 425,419, I

To all vhom it may concern:

Be it known that I, GUsTAvn CARLSON,

Y of Plainfield, county of Union, and State of New Jersey, have invented certain new and useful Improvements in Concrete-Mixers, ofwhich the following is a full, clear, and exact specification, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an apparatus for mixing concrete designed especially for use in the formation of concrete buildings and other structures which are raised above the level of the ground and the underlying object of the invention is to facilitate the mixing and lifting operations. I attain this end by organizing the mixer in such a manner that it serves also to lift the concrete, with the result that the niixingphainber may be charged with the aggregateof which the concrete is formed when the chamber is at the grade line and the operation of lifting the mixing chamber to the point \of application of the concrete will also serve to rotate or otherwise agitateJt-hc mixing chamber so that the elements of the concrete are mixed simultaneously with the elevating operation.

This brings about an obvious saving both enlarged end view of the mixing chamber,

' materials.

the sustaining cable and guides; Fig. 4 is an enlarged section of the mixing chamber showing the devices for adjustably holding it in its supporting ring or gimbal;- and Fig. 5 is an enlarged detail section on the line 55 of Fig. 3. K

The mixing chamber or drum 10 1s preferably of double conical form w1t h open ends 15 for charging 'and discharging. the

the drum with lifting flanges. 16 the form and arrangement. of which however, is quite immaterial to the present invention. Embracing the mixing drum 10 at its largest.

Interiorly I prefer to provide' Specification of Letters Patent. Patented Aug. 30, 1910.

diameter'is an annular member in the form of a gimbal ring 17 which, as shown in Figs."

3 and 5 is itself embraced by a yoke 18 having slldmg engagement with the gimbal ring and provided, if'desired, with anti-friction rollers or equivalent devices 19. These yokes' 18 have studs 20 on which the drum 10 is rotatably mounted. By this arrangement the drum is carried bodily within the gimbal ring but it is capable of rotation therein and also of pivotal movement, the pivotal movement allowing the drum to tilt toward eitherside in the manner shown by {dottedlines in Fig. 4, to dump'its contents. Devices are provided for releasably locking the drum in the gimbal ring to prevent it from rotating in the plane of the-ring and from tilting around the studs 20. These devices may be of various embodiment but, as here shown, they consist of a rocking lock 21 mounted in bearings 22 secured to the" middle of the drum and said lock being capable. of rocking outward. into firm engagement with the gimbal ring so that it not only prevents pivotal movement of the drum aroundthe studs 20, but also prevents rotating movementof the drum in the plane of the gimbal ring. This lock is adapted'ito be operated from each end of the drum,'the

devices here shown for this purpose consist-i ingin rock shafts 23 connected by universal joints 32 with the terminals of the trun- -nions 33 of the rocking lock 21,- the trunnions 33 bei'n journaled in the bearings 22,

the rock sha ts 23 being mounted in bearings 24.. on the sides ofthe-drum and provided with cranked ends .23 with which latches 25 coact respectively, these latches holding the rock shaft securely, yet removably, in that position which corresponds to the active position "of the lock 21. The latches 25' are-rods disposed on the'drum which slide in the guides 34 .the heads on rods preventing them from slipping through the said guides. To release the drum from the ring, therefore, it is only necessary to push the latches 25 upwardly and impart a partial rotation to the shafts 23 thus throw- 3 ing the lock'21 against the drum and disengaging it from the gimbal ring. The drum is then free to tilt around the studs 20 and to roll in the ring independently thereof around the longitudinal axis of the drum.

In adapting the mixer to use in conne ction with vertical structures. two guiderails also receives a cable 25; which passes inside of the guide rails 26 and has one end fastened' at the top of the structure as indicated at29 while the other end is attachedto a suitable winding drum or other winding de- ,vice '30. The cable 28, it will be perceived,

runs free in the groove 2T of the gimbal -ring and upon winding the cable on the drum, 30 the mixer drum 10 is given a ($01111 bined lifting and rotating action,

In the use of the invention the niixing drum is lowered to the grade line'and the lock 21 is thrown up into engagement with the gimbal ring so that the mixing drum l0 and gimbal ring 17 move as a unit. The various materials of which the concrete mixture is formed are now charged into the drum and the winding device 30 is operated which causes the mixing drum and giinbal ring to "i nove up between the guides 2Gwvith a combined lifting and rotating action This lifting action raises the materials t0 the point of use and the rotating action thoroughly mixes them so that by the time the materials are lifted to the desired point on the building they are thoroughly mixed and the concrete is ready for use. At this time the operator disengages the lock 21 from the gimbal ring with the result that the weight of the concrete in the drum will cause it to roll slightly in the ring until the studs 20 of the yokes 1% lie in-a horizontal line. This operation may, if desired, be assisted by manual pressure on the drum. During said operation the lock 21 may be held so that it still engages the sides of the gimbal ring and prevents the mixing drum from tilting around its pivots or studs E20. How-- ever, after the drum has rolled to place these pivots 20 in a horizontal line the disengagement of the lock ill from the gimbal ring may becompleted and tliereuponthe drum will be free to tilt around its pivots 30. This operation may be guided and controlled by the operator so that the drum. will be caused to tilt inward dumping its contents into carts or other devices provided" for the The drum may then Jl engaged with the will be reception of the same. be returned and the lock 'giinbal ring, after which the parts ready for a second operation.

Having thusdescribed my invention, what I claim as new and desire to secure by Letters Patent of the United States is '1 An apparatus'for mixing concreteliava drum, an annular member disposed around the periphery of the drumadapted to move independently thereof, there being a groove in the member, means to releasably' ceptaele to the yokes,

secure the annular member to the drum, a cable disposed in the groove and fixed at one end, means l'or pulling upwardly the other end of the cable whereby to impart to the drum a, combined biting and rotating action and guides which engage the member.

2'. An apparatus for mixing concrete having a receptacle for the materials, a supporting member in which said receptacle is pivoted, means for releasably holding the receptacle against pivotal movement anddevices engaged with said supporting member to impart to it and to the receptacle a conibined lifting and rotating ii'ioven'teiit the axis of the latter being. at an angle to the axis of the pivoted connection between the receptacle and the supporting member.

5. An apparatus for mixing concrete having a receptacle for the materials, a supporting member in which said receptacle is pivoted, means for releasably holding the receptacle against pivotal movement and devices engaged with said supporting member to impart to it and to the receptacle a coinbincd lifting and rotating movement the axis of the latter being at an angle to the axis of the pivoted connection between the receptacle and the supporting member, such devices comprising a cable engaged with the supporting member and means for pulling upward on one end of the cable.

t. An apparatus for mixing concrete having a receptacle for the materials, a supporting member in which said receptacle is pivoted, means for releasably holding the receptacle against pivotal movement, devices engaged with said supporting member to impart to it and to the receptacle a combined lifting and rotating movement the axis of the latter the axis of the pivoted connection between the receptacle and the supporting member, such devices comprising a cable engaged with the supporting member, means forpulling upward on one end of the cable anda vertical guide with which the said supporting member is engaged.

5. An apparatus lorinixing concrete hav-v ing a receptacle for the materials, a. ginibal the combination of a receptacle for the materials, a gimbal ring encircling the-same, two yokes arranged to slide freelyon the gimbal ring, means for pivoting said remeans for releasably being at an angle to locking the receptacle against movement in- I dependent of the ring and means for imparting to the ring a combined rotating and lifting motion.

7.. An apparatus for mixing concrete having a receptacle for the materials, a'ring, pivotal comiections between the receptacle and ring, to permit the receptacle to tilt, means for securing the receptacle to the ring to lock the receptacle against tilting ring and pivotal motion across the axis .of

rotation of the receptacle, devices for releasably locking the receptacle against movement independently of the ring which secures the'ring to the receptacle during their complete rotation and means for supporting the ring which is adapted to impart thereto a rotating motion.

9. In an apparatus for mixing concrete the combination of a receptacle for the materiafls, .a ring encircling the same, there be-' ing a groove in the ring, means by which the receptacle is pivoted to the ring, means for locking the receptacle to the ring, so

that they will be secured together during their complete rotation, a cable disposed in the groove and means for pulling upwardly on one end of the cable whereby to impart to the drum :1 combined lifting and rotating action.

10. An apparatus for mixing'concretehaving a drum converging toward its heads, a ring in which the drum is pivoted, the ring being disposed substantially in the plane of the greatest diameter of the drum and oeing spaced therefrom, means for rotating the ring in its own plane and 'means'for locking the receptacle against movement independent of the ring so that they will be secured together during their complete rotation.

11. .In an apparatus for mixing concrete having a drum, an annular member disposed around the periphery of the drum adapted to move independently thereof, two yokes which embrace and have sliding engagement with the annular member, the drum being pivoted to the yokes', means for securing the drum to the annular member and means for rotating the annular member.

GUSTAVE CARLSON. 4 Witnesses:

A. W. REINBERG, RANDALL H. LUDWELL. 

